CN115112977A - Multi-channel frequency conversion module calibration and measurement integrated automatic test platform and test method - Google Patents

Abstract

The invention discloses a multi-channel frequency conversion module calibration and measurement integrated automatic test platform and a test method, wherein the test platform comprises the following steps: the system comprises a measurement and control information server, a calibration and measurement integrated machine, a test instrument and a to-be-tested product, wherein the measurement and control information server is respectively connected with the calibration and measurement integrated machine and the test instrument, and the test instrument is connected with the to-be-tested product; the calibration and test integrated machine comprises a signal distribution module and a variable frequency calibration module, a test instrument is connected with a to-be-tested object through the signal distribution module, a vector network analyzer in the test instrument is connected with the variable frequency calibration module, the variable frequency calibration module is used for calibrating the vector network analyzer, and a calibration file is obtained and stored in the vector network analyzer; configuring test parameters by the measurement and control information server, calling a calibration file, generating a test instruction according to a test item, and sending the test instruction to a test instrument; the test instrument generates microwave radio frequency signals to the to-be-tested object and obtains test data, and the measurement and control information server carries out local area network release on the test data. The invention carries out automatic test based on the calibration file, and has small test error.

Description

Multi-channel frequency conversion module calibration and measurement integrated automatic test platform and test method

Technical Field

The invention relates to the technical field of microwave radio frequency module testing, in particular to a multi-channel frequency conversion module calibration and test integrated automatic test platform and a test method.

Background

In modern radar, communication and electronic countermeasure systems, frequency conversion technology is applied more and more, and in addition, the phased array technology is widely applied, and the number of multi-channel frequency conversion channels is increased more and more. The frequency conversion module has various test indexes, time and labor are wasted by using the traditional manual test, certain requirements are required for the technical level of testers, and the microwave technical base, the capability level, the operation proficiency and the like of the technicians can influence the test result.

The automatic test is an important direction of the microwave module test and a trend, can improve the working efficiency, save the time cost and the labor cost, and is convenient for carrying out comprehensive and deep analysis on the product to be tested.

Data network informatization is also a direction of test system development, and in the big data era, data transmission and sharing play more and more important roles, which is beneficial to improving the rapid analysis capability and rapid inspection capability of a to-be-tested product. The existing microwave frequency conversion module test system is isolated, so that inconvenience and low efficiency of data analysis and inspection processes are caused.

In the related art, the chinese patent application with application publication number CN107733539A discloses a method and system for testing a satellite-borne multipath microwave receiver/frequency converter, which comprises a switch network, a controller, a vector network analyzer, a spectrum analyzer and a power meter; the switch network selectively connects the vector network analyzer, the spectrum analyzer and the power meter to the satellite-borne multi-path microwave receiver or the frequency converter under the control of the controller; the controller controls and realizes channel gain, gain flatness or gain slope test, amplitude consistency test, 1dB compression point test, startup and shutdown instruction test and gain increase and decrease instruction test. However, this solution only involves general measurement items of the receiver and the frequency converter, and cannot perform frequency conversion calibration and network information processing of test data.

Disclosure of Invention

The invention aims to solve the technical problem of reducing the test error of the multi-channel frequency conversion module.

The invention solves the technical problems through the following technical means:

on one hand, the invention provides a multi-channel frequency conversion module calibration and measurement integrated automatic test platform, which comprises: the system comprises a measurement and control information server, a calibration and test integrated machine, a test instrument and a to-be-tested article, wherein the measurement and control information server is respectively connected with the calibration and test integrated machine and the test instrument, and the test instrument is connected with the to-be-tested article through a cable; the all-in-one of proofreading includes signal distribution module and frequency conversion calibration module, the tester table warp signal distribution module with the article that awaits measuring is connected, vector network analysis appearance among the tester table with frequency conversion calibration module connects, wherein:

calibrating the vector network analyzer by using the variable frequency calibration module to obtain a calibration file of each path of the multiple variable frequency channels, and storing the calibration file into the vector network analyzer to be used as a test reference for testing the to-be-tested object;

the measurement and control information server is used for configuring the test parameters of the to-be-tested object, calling the calibration file, generating a test instruction according to a required test item and sending the test instruction to the test instrument;

the test instrument generates a corresponding microwave radio frequency signal according to the received test instruction, inputs the microwave radio frequency signal to the to-be-tested product, and controls the multi-path distribution and the test sequence of the signal based on the signal distribution module so that the output signal of the to-be-tested product is fed back to the test instrument;

the test instrument transmits test data to the measurement and control information server for storage;

the measurement and control information server executes the INTERNET service management function and issues the local area network.

Before testing a to-be-tested product, calibrating a vector network analyzer by using a calibration and test all-in-one machine to obtain a calibration file of each path of a multi-path frequency conversion channel, and storing the calibration file in an internal memory of the vector network analyzer by using the calibration file as a test reference for testing the to-be-tested product; when the related indexes of the to-be-tested product are tested, the measurement and control information server calls the calibration file, the to-be-tested product is measured according to the calibration file, the to-be-tested product is located on the same reference platform based on the measurement of the calibration file, the product testing consistency is good, and the testing error is small.

Further, the frequency conversion calibration module includes a local oscillator power divider, a reference frequency converter, a calibration frequency converter and an intermediate frequency filter, the radio frequency and intermediate frequency ends of the reference frequency converter and the radio frequency end of the calibration frequency converter are respectively connected to the vector network analyzer, and the intermediate frequency end of the calibration frequency converter is connected to the vector network analyzer after passing through the intermediate frequency filter; the local oscillator power divider is connected with a reference frequency conversion local oscillator port of the reference frequency converter.

Furthermore, a reference frequency conversion signal input port of the reference frequency converter is connected with a frequency conversion reference input port of the vector network analyzer, and a reference frequency conversion signal output port is connected with a frequency conversion reference output port of the vector network analyzer;

a local oscillator input port of the local oscillator power divider is connected with a local oscillator output main port of the vector network analyzer, a reference local oscillator output port of the local oscillator power divider is connected with a reference frequency conversion local oscillator port of the reference frequency converter, and a calibration local oscillator output port of the local oscillator power divider is connected with a calibration frequency conversion local oscillator port of the calibration frequency converter;

and a calibration frequency conversion input port of the calibration frequency converter is connected with each channel input port in the signal distribution module, and a calibration frequency conversion output port is connected with each channel output port in the signal distribution module.

Further, the signal distribution module comprises a signal input matrix and a signal output matrix, wherein:

the signal input matrix comprises a multi-path power divider and a mechanical switch matrix; the signal output matrix adopts a combined mechanical switch matrix, the multi-path power divider is connected with the mechanical switch matrix, and the mechanical switch matrix is connected with the combined mechanical switch matrix;

a radio-frequency signal output port of the vector signal analyzer is connected with the multi-path power divider, and an output main port of the combined mechanical switch matrix is connected with a radio-frequency signal input port of the vector signal analyzer;

and the input/output port of each channel in the mechanical switch matrix is connected with the calibration frequency conversion input/output port of the calibration frequency converter or connected with the to-be-detected object.

Further, the measurement and control information server comprises a measurement and control module and an information module, wherein the measurement and control module comprises an instrument information configuration unit, an automatic test unit and a data processing unit, and the measurement and control module comprises:

the instrument information configuration unit is used for configuring reference information, test items and state parameters of the to-be-tested object and calling the calibration file;

the automatic test unit is used for generating a corresponding test instruction to the test instrument according to the configured test items;

the data processing unit is used for acquiring the test data, sorting the test data according to test items and channels to generate a test result report and storing the test result report;

the information module comprises a WEB service unit and a remote data checking unit, wherein:

the WEB service unit is used for establishing WEB services, opening a network HTTP protocol, starting an INTERNET information service function and issuing the test result report form through a local area network;

the remote data checking unit is used for the remote terminal to inquire the test result report.

Furthermore, the test instrument also comprises a program-controlled power supply, a signal source, a frequency spectrograph, a vector network analyzer and a noise tester.

Furthermore, the to-be-detected product is a multi-path microwave radio frequency module with a frequency conversion function.

In addition, the invention also provides a multi-channel frequency conversion module calibration and measurement integrated automatic test method, which is used for testing by using the multi-channel frequency conversion module calibration and measurement integrated automatic test platform, and the test method comprises the following steps:

calibrating the vector network analyzer by using the calibration and test all-in-one machine to obtain a calibration file of each path of the multi-path variable frequency channel, and storing the calibration file into the vector network analyzer to be used as a test reference for testing the to-be-tested object;

configuring test parameters of the to-be-tested object by using the measurement and control information server, calling the calibration file, generating a test instruction according to a required test item and sending the test instruction to the test instrument;

generating a corresponding microwave radio frequency signal by using the test instrument according to the received test instruction, inputting the microwave radio frequency signal to the to-be-tested product, and performing multi-path distribution of the signal and control of a test sequence based on the calibration and test integrated machine so that the output signal of the to-be-tested product is fed back to the test instrument;

transmitting test data to the measurement and control information server by using the test instrument for storage;

and the measurement and control information server is used for executing an INTERNET service management function and issuing the service through a local area network.

Further, the calibrating of the vector network analyzer is performed by using the calibrating and testing all-in-one machine, so as to obtain a calibration file of each path of the multiple paths of frequency conversion channels and store the calibration file into the vector network analyzer, and the calibrating and testing all-in-one machine comprises the following steps:

connecting the input and output ends of the reference frequency converter to the reference end of the vector network analyzer, connecting the calibration frequency converter to the port of the signal input and output matrix, and connecting the calibration frequency converter to the signal port of the vector network analyzer through the input and output main port of the calibration frequency converter;

providing local oscillation signals by using a vector network analyzer, and respectively connecting the local oscillation ends of the reference frequency converter and the calibration frequency converter after passing through the local oscillation power divider;

and setting calibration parameters, calibrating, and storing the obtained multi-path calibration files into the vector network analyzer.

Further, the utilizing the test instrument to generate a corresponding microwave radio frequency signal according to the received test instruction, inputting the microwave radio frequency signal to the to-be-tested product, and performing multi-path distribution of the signal and control of the test sequence based on the calibration and test integrated machine so as to feed back the output signal of the to-be-tested product to the test instrument includes:

during testing, connecting the input end and the output end of the to-be-tested object to a signal input matrix in the test instrument;

providing a local oscillator signal and an input signal by using the vector network analyzer;

the test instrument receives the test instruction sent by the measurement and control server, the mechanical switches are turned on one by one, and after the test is finished, the next switch is turned on and turned off in sequence;

and the test instrument receives the signal of the output end of the product to be tested and displays the signal in an instrument display.

The invention has the advantages that:

(1) before testing a to-be-tested object, calibrating a vector network analyzer by using a calibration and test all-in-one machine to obtain a calibration file of each path of a plurality of paths of frequency conversion channels, wherein the calibration file comprises a plurality of paths of pilot frequencies in the frequency conversion channels, and the calibration file is used as a test reference for testing the to-be-tested object and is stored in an internal memory of the vector network analyzer; when the related indexes of the to-be-tested product are tested, the measurement and control information server calls the calibration file, the to-be-tested product is measured according to the calibration file, the to-be-tested product is located on the same reference platform based on the measurement of the calibration file, the product testing consistency is good, and the testing error is small.

(2) Aiming at test data, the measure of database management, internal local area network release and the like is introduced into the measurement and control information server, so that the informatization is greatly improved, the data sharing capability is enhanced, the data security is improved, the data auditing, checking, analyzing and troubleshooting efficiency is greatly improved, and the production quality inspection efficiency is greatly improved.

(3) The frequency conversion calibration module comprises a plurality of frequency converters, the automatic test integration level of the plurality of frequency converters is improved, the model extension of the frequency converters and the filter can be carried out according to the working frequency of an actual object to be tested, the expandability is enhanced, the test adaptability is enhanced, and the test range is increased.

(4) The required local oscillator is generated by the vector network analyzer, so that the frequency range is large and the adjustability is good.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an integrated automatic test platform for calibrating a multi-channel frequency conversion module according to a first embodiment of the present invention;

FIG. 2 is a flow chart of a system application of the automatic test platform according to the first embodiment of the present invention;

FIG. 3 is a block diagram of an automatic index test according to a first embodiment of the present invention;

FIG. 4 is a block diagram of a calibration and test integrated machine according to a first embodiment of the present invention;

fig. 5 is a block diagram of vector network frequency conversion calibration provided in the first embodiment of the present invention;

fig. 6 is a block diagram of a vector network frequency conversion test provided in the first embodiment of the present invention;

fig. 7 is a flowchart of an automatic testing method for calibrating and testing a multi-channel frequency conversion module according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, fig. 2, and fig. 3, a multi-channel frequency conversion module calibration and test integrated automatic test platform according to a first embodiment of the present invention includes: the system comprises a measurement and control information server 10, a calibration and measurement integrated machine 20, a test instrument 30 and a to-be-tested product 40, wherein the measurement and control information server 10 is respectively connected with the calibration and measurement integrated machine 20 and the test instrument 30, and the test instrument 30 is connected with the to-be-tested product 40 through a cable; the all-in-one machine 20 comprises a signal distribution module 21 and a frequency conversion calibration module 22, the test instrument 30 is connected with the article to be tested 40 through the signal distribution module 21, a vector network analyzer in the test instrument 30 is connected with the frequency conversion calibration module 22, wherein:

calibrating the vector network analyzer by using the frequency conversion calibration module 22 to obtain a calibration file of each path of the multiple frequency conversion channels, and storing the calibration file into the vector network analyzer as a test reference for testing the to-be-tested object 40;

the measurement and control information server 10 is configured to configure test parameters of the to-be-tested object 40, call the calibration file, generate a test instruction according to a required test item, and send the test instruction to the test instrument 30;

the test instrument 30 generates a corresponding microwave radio frequency signal according to the received test instruction, inputs the microwave radio frequency signal to the to-be-tested object 40, and performs multi-path distribution of the signal and control of the test sequence based on the signal distribution module 21, so that the output signal of the to-be-tested object 40 is fed back to the test instrument 30;

the test instrument 30 transmits test data to the measurement and control information server 10 for storage;

the measurement and control information server 10 executes the INTERNET service management function and issues the local area network.

It should be noted that the to-be-tested object 40 is a multi-channel microwave rf module with a frequency conversion function, is connected to the test instrument 30, receives a microwave signal through the test instrument 30 according to different index commands issued by the measurement and control server, and outputs a corresponding feedback signal to the test instrument 30, so that different test items perform different test operations.

The frequency conversion calibration module 22 is used for calibration before the frequency conversion module is tested and comparison reference in the test, is connected with the test instrument 30 during calibration, and is partially connected with the test instrument 30 to be used as the reference of the reference frequency converter when the to-be-tested object 40 is tested; meanwhile, the type extension of the reference frequency converter, the calibration frequency converter and the filter can be performed according to the working frequency of the object to be measured 40, so that the reference frequency converter, the calibration frequency converter and the filter are matched with the working frequency of the object to be measured 40.

The calibration and test integrated machine provided in the embodiment integrates two functions of calibration and test, and is used for calibrating and subsequently automatically testing the test instrument before automatic test according to the requirement of the test index item; the vector network analyzer is connected with the to-be-detected product and used for receiving the instruction sent by the measurement and control information server, generating a microwave signal and receiving an output signal of the to-be-detected product; before testing the multi-channel frequency conversion module, a frequency conversion calibration module is connected with a signal matching module to calibrate the vector network analyzer to obtain a calibration file of each path of the multi-path frequency conversion channels, the calibration file contains multi-path pilot frequency conditions in the frequency conversion channels, and the calibration file is used as a test reference for testing a to-be-tested object and is stored in an internal memory of the vector network analyzer; when the related indexes of the to-be-tested product are tested, the measurement and control information server calls the calibration file, the to-be-tested product is measured according to the calibration file, the to-be-tested product is located on the same reference platform based on the measurement of the calibration file, the product testing consistency is good, and the testing error is small.

Furthermore, the measurement and control information server 10 in this embodiment has the characteristic of data informatization, establishes a data distribution WEB page by opening a WEB service, and calls test information of a local database through an HTTP service, so as to meet the data query and inspection requirements of any to-be-tested object 40 at any stage in the same local area network. The test platform has high test efficiency and test consistency, can greatly reduce errors caused by human factors to tests, is convenient for timely query and inspection of the to-be-tested object 40 by project groups and quality departments, accelerates the progress of the production process, and greatly saves time cost and labor cost.

In an embodiment, as shown in fig. 4, the frequency conversion calibration module 22 includes a local oscillator power divider, a reference frequency converter, a calibration frequency converter, and an intermediate frequency filter, where a radio frequency end and an intermediate frequency end of the reference frequency converter and a radio frequency end of the calibration frequency converter are respectively connected to the vector network analyzer, and the intermediate frequency end of the calibration frequency converter is connected to the vector network analyzer after passing through the intermediate frequency filter; the local oscillator power divider is connected with a reference frequency conversion local oscillator port of the reference frequency converter.

In one embodiment, a reference variable frequency signal input port of the reference frequency converter is connected with a variable frequency reference input port of the vector network analyzer, and a reference variable frequency signal output port is connected with a variable frequency reference output port of the vector network analyzer;

a local oscillator input port of the local oscillator power divider is connected with a local oscillator output main port of the vector network analyzer, a reference local oscillator output port of the local oscillator power divider is connected with a reference frequency conversion local oscillator port of the reference frequency converter, and a calibration local oscillator output port of the local oscillator power divider is connected with a calibration frequency conversion local oscillator port of the calibration frequency converter;

and a calibration frequency conversion input port of the calibration frequency converter is connected with each channel input port in the signal distribution module 21, and a calibration frequency conversion output port is connected with each channel output port in the signal distribution module 21.

It should be noted that the frequency conversion calibration module 22 is used for performing frequency conversion calibration before testing and reference comparison during testing, and in the process of calibrating the instrument before testing, a calibration frequency conversion input port of the calibration frequency converter is connected to each channel input port in the signal distribution module 21, and a calibration frequency conversion output port is connected to each channel output port in the signal distribution module 21.

It should be noted that before testing some important indexes (such as gain, phase, group delay, etc.), the calibration of the vector network analyzer must be performed by the frequency conversion calibration module 22 in the integrated calibration and measurement machine 20. The frequency conversion calibration module 22 uses an internal two-power divider to send local oscillation signals generated by the vector network analyzer to local oscillation ports of the reference frequency converter and the calibration frequency converter, and radio frequency and intermediate frequency ends of the two frequency converters are respectively connected to the vector network analyzer, wherein the intermediate frequency end of the calibration frequency converter is connected to the filter and then connected to the vector network analyzer. The calibrated file is used as a test reference for testing the to-be-tested object 40 and is stored in the internal memory of the vector network analyzer. And when the relevant indexes of the to-be-measured object 40 are tested, the calibration file is called in the configuration interface by automatic test software of the measurement and control server, and the to-be-measured object 40 is measured according to the calibration file. Based on the measurement of the calibration file, the to-be-measured object 40 is positioned on the same reference platform, the product test consistency is good, and the test error is small.

In one embodiment, the signal distribution module 21 comprises a signal input matrix and a signal output matrix, wherein:

the signal input matrix comprises a multi-path power divider and a mechanical switch matrix; the signal output matrix adopts a combined mechanical switch matrix, the multi-path power divider is connected with the mechanical switch matrix, and the mechanical switch matrix is connected with the combined mechanical switch matrix;

a radio-frequency signal output port of the vector signal analyzer is connected with the multi-path power divider, and an output main port of the combined mechanical switch matrix is connected with a radio-frequency signal input port of the vector signal analyzer;

and the input/output port of each channel in the mechanical switch matrix is connected with the calibration frequency conversion input/output port of the calibration frequency converter or connected with the to-be-detected object 40.

The signal distribution module 21 is configured to connect the test instrument 30 and the object to be tested 40 in the multipath channel test, and transmit a microwave signal. The multi-path power divider is used for inputting multi-path signals, path number expansion can be carried out according to the number of the 40 paths of the to-be-detected product, and microwave input signals are distributed by the multi-path power divider and then are connected with the mechanical switch matrix; the mechanical switch matrix can expand the number of channels according to the number of the channels of the object to be tested 40, and is used for switching and testing the on-off of multiple channels according to the control instruction, so that the test orderliness is realized.

It should be noted that the to-be-tested object 40 is a multi-channel frequency conversion module, and the number of the multi-channel power dividers and the internal matrix switches of the signal distribution module 21 in the extensible calibration and measurement all-in-one machine 20 is determined according to the number of channels of the frequency conversion module; and according to the working frequency of the frequency conversion module, expanding the model types of a reference frequency converter and a calibration frequency converter in a frequency conversion calibration module 22 of the calibration and measurement all-in-one machine 20. After receiving a path of microwave signal from the test instrument, the signal distribution module 21 performs power distribution through the multi-path power divider, the output end of the multi-path power divider corresponds to the internal mechanical switches of the test equipment one by one, and the other end of the mechanical switch is connected to the input end of the multi-path channel of the product to be tested 40 by using the radio frequency cable, and corresponds to the input end of the multi-path channel one by one. Each path of output of the to-be-tested object is connected with the mechanical switches in the testing equipment in a one-to-one correspondence mode, and the connected mechanical switches are combined into one path through the multiple combination switch and connected to the input end of the testing instrument.

The calibration and test all-in-one machine 20 provided by the embodiment improves the automatic test integration level of the multi-channel frequency converter, enhances the expandability, enhances the test adaptability and increases the test range.

Specifically, as shown in fig. 5, vector network frequency conversion calibration is performed before testing, and during calibration, the calibration and measurement all-in-one machine 20 is used to connect the input/output end of the reference frequency converter to the reference end of the vector network analyzer, and the calibration frequency converter is connected to the input/output port via the single input/output port in the input/output mechanical switch matrix in the signal distribution module 21, and then is connected to the signal port of the vector network analyzer. The vector network analyzer provides local oscillation signals, the local oscillation signals pass through a local oscillation power divider which divides two into two and then are respectively connected with local oscillation ends of a reference frequency converter and a calibration frequency converter, calibration parameters (frequency and bandwidth) are set for calibration, a single-path calibration file is stored in the vector network analyzer, the calibration process is repeated after one path of channel is changed until all paths are calibrated, and calibration files of all paths are stored in the vector network analyzer.

As shown in fig. 6, in the configuration module of the automatic test software of the measurement and control information server 10, the position of the calibration file is specified, and the calibration file is used as the initialization state of the test. During testing, the input end of the multi-channel to-be-tested object 40 is connected with the input mechanical switch matrix in the signal distribution module 21, the output end of the multi-channel to-be-tested object 40 is connected with the output mechanical switch matrix in the signal distribution module 21, and the local oscillation signal and the input signal are both provided by the vector network analyzer. The input and output mechanical switch matrix in the calibration and test all-in-one machine 20 receives the instruction sent by the measurement and control server, turns on the mechanical switches one by one, and turns off and turns on the next switch after the test is finished. The test instrument 30 receives the signal of the output end of the to-be-tested object 40, displays the signal in the instrument display, and transmits the related test data back to the measurement and control information server 10, and the test data is summarized and processed by the automatic test software to form test result data.

It should be noted that, in this embodiment, the multi-channel frequency conversion module performs channel testing one by one, the testing operation is performed in series, the processes are independent, and no influence is caused between the processes. And the required local oscillator is generated by the vector network instrument, so that the frequency range is large and the adjustability is good.

In an embodiment, the measurement and control information server 10 includes a measurement and control module and an information module, the measurement and control module includes a meter information configuration unit, an automatic test unit and a data processing unit, wherein:

the instrument information configuration unit is used for configuring reference information, test items and state parameters of the to-be-tested object 40 and calling the calibration file;

the automatic test unit is used for generating a corresponding test instruction to the test instrument 30 according to the configured test item;

the data processing unit is used for acquiring the test data, sorting the test data according to test items and channels to generate a test result report and storing the test result report;

the information module comprises a WEB service unit and a remote data checking unit, wherein:

the WEB service unit is used for establishing WEB services, opening a network HTTP protocol, starting an INTERNET information service function and issuing the test result report form through a local area network;

the remote data checking unit is used for the remote terminal to inquire the test result report.

Specifically, the meter information configuration unit is used for a meter information configuration subunit, a test information configuration subunit and a test item configuration subunit: when the equipment runs, the instrument information configuration subunit is used for configuring instrument information, such as instrument type number drive, IP address, physical network card address and the like, in the instrument information configuration module, establishing connection between the instrument and the measurement and control information server, and transmitting test data;

the test information configuration subunit is used for remarking some environmental information of the test process, such as test stage, test place, test time, environmental temperature, environmental humidity, test item, test batch, test model and the like, calling a calibration file in the instrument, and recording the test parameters into a test database;

the test item configuration subunit specifically configures corresponding test items required according to the index requirements, such as amplitude and phase tests, spectrum tests, noise tests and the like.

Specifically, the automatic test unit comprises an amplitude-phase test subunit, a frequency spectrum test subunit and a noise test subunit: when the device runs, a corresponding test item to be tested is selected from the automatic test unit of the test module, the automatic test unit generates a corresponding test instruction to the control instrument, and the instrument generates a corresponding microwave radio frequency signal which is transmitted to the to-be-tested object 40 through the calibration and test integrated machine 20, so that automatic test is performed.

Specifically, the data processing unit comprises a data acquisition subunit, a data sorting subunit and a data storage subunit: the data collection subunit is configured to collect data generated during the collection test and information such as a screen shot of the meter from the meter by issuing an instruction to the test meter 30.

The data sorting subunit is used for carrying out preliminary classification, integration and summarization on the acquired test data to form a complete and detailed test result.

The data storage subunit is used for classifying and storing the test results into the database according to the test items and the channels, and establishing corresponding index information in the database, so that the search is facilitated.

Further, the measurement and control information server 10 is connected to the test instrument 30 through a network cable, and the test instrument 30 is connected to the to-be-tested object 40 through a radio frequency cable and a low frequency cable. Automatic test software in the measurement and control information server 10 firstly configures the parameters of the instrument through a human-computer interaction interface:

on the man-machine interaction interface, selecting the instrument to be connected, filling the IP address of the instrument, performing interconnection and intercommunication between the automatic test software and the instrument, displaying the on-off state of the instrument on the interface of the automatic test software by a clear indicator lamp, and giving a warning prompt to the instrument which is not successfully connected.

And inputting relevant test information such as test date, test place and test stage, item code of the to-be-tested product, model of the to-be-tested product, serial number of the to-be-tested product and the like on a human-computer interaction interface, and processing and integrating the information and the test data into a test data record table.

Inputting the voltage value of a power supply on a human-computer interaction interface, and turning on an instrument power switch to supply power to a to-be-detected product; meanwhile, the voltage and current values of the to-be-detected product can be fed back from the software interface, and whether the to-be-detected product works normally or not is monitored.

In a man-machine interaction interface, selecting an electrical performance index item to be tested according to test requirements, generating a corresponding instruction by test software, transmitting the instruction to a test related instrument through a network cable, generating corresponding feedback by the test instrument according to the received instruction, inputting a signal to a product to be tested, receiving signal information output by the product to be tested, displaying the signal information in the instrument, simultaneously transmitting the related signal information to a measurement and control server by the instrument through the network cable, automatically summarizing in automatic test software, sorting and generating a test result report, storing the report in an SQL SERVER database of the measurement and control information server, and issuing a local area network through an INTERNET service management function of the server.

In this embodiment, the measurement and control information server 10 is used to control the test instrument and the automatic test program of the product to be tested, and may be used to configure the reference data of the product to be tested 40, and configure the test items of the product to be tested and the state parameters of the test instrument; the method can also be used for acquiring calibration data files of a product to be tested and a test instrument; the method can also generate a specific automatic test instruction according to the test item of the product to be tested, issue the automatic test instruction to the calibrated test instrument, collect test data generated in the automatic test process of the calibrated test instrument, generate a test result report according to the test data, and store test data and backup data.

Further, the WEB service unit is configured to open a network HTTP protocol on the measurement and control information server 10, and open an internet information service function, so that test data in the server database can be accessed by a computer with a corresponding right in the local area network. The remote data checking unit is used for connecting the server database by using a network programming language and realizing the function of inquiring the test data according to the customized page.

In this embodiment, the WEB service unit in the measurement and control information server 10 simultaneously establishes a WEB service, starts an INTERNET information service function, performs configuration related to a database and a file directory, opens an HTTP access port, loads a network programming language development environment, and creates a remote access test data query and inspection information platform by using a network programming language and a local database, so that any computer with authorization in a local area network can access the server, and can selectively query and inspect test data of a to-be-tested object of any model and any number at any stage according to a customization requirement, and can also perform comparison and analysis between test data of different batches of to-be-tested objects.

Wherein, the information data checking unit is developed by a network programming language ASP and a database SQL SEVER. SQL SERVER has expandability and high efficiency, can make full use of WINDOWS NT advantages, has advanced system management, supports WINDOWS graphic management tools, and supports local and remote system management and configuration; the object processing function is strong, a symmetric multiprocessor structure is supported, a strong management tool and INTERNET are tightly integrated, a superior database platform is provided for data of a test system, and multi-thread efficient execution of query and verification of test data and multi-round multi-batch data comparison can be achieved.

The automatic test software is developed by adopting LABVIEW, the LABVIEW is a graphical programming language which uses icons to replace texts to create application programs, the execution sequence of the programs is different from the execution sequence of the traditional text programming language which is determined according to the sequence of sentences and instructions, the LABVIEW adopts a data flow programming mode, the execution sequence of VI and functions is determined by the data flow direction between nodes in a program block diagram, the generated program is in the form of a block diagram, the man-machine interaction is easy, the method is an ideal choice for developing a measurement or control system, and when the LABVIEW is used for designing and testing and realizing an instrument system, the working efficiency can be greatly improved. The automatic test software compiled by the LABVIEW is connected with the test instrument 30 in the measurement and control information server 10 through a network port, transmits a test instruction and a data acquisition instruction through a TCP/IP protocol, and processes data in the measurement and control information server 10.

In an embodiment, the test instrument 30 further includes a program-controlled power supply, a signal source, a spectrum analyzer, a noise tester, and the like, and each of the instruments is connected to the measurement and control information server 10 through an LAN port, and is configured to receive an automatic test instruction according to a requirement of a test index item, perform an automatic test on a calibrated product to be tested according to the automatic test instruction, generate test data, and transmit the data to the information server. Wherein:

the program-controlled power supply is connected with the to-be-detected product 40 and is used for receiving the instruction sent by the measurement and control server, generating corresponding voltage and outputting the voltage to the to-be-detected product 40 so as to supply power to the to-be-detected product 40 and enable the to-be-detected product to work normally;

the signal source is connected with the to-be-detected product 40 and used for receiving the instruction sent by the measurement and control server, generating a corresponding microwave signal and outputting the microwave signal to the to-be-detected product 40;

the frequency spectrograph is connected with the to-be-measured product 40, and is used for receiving the instruction sent by the measurement and control server and receiving the microwave signal output by the to-be-measured product 40;

the noise tester is connected with the object to be tested 40 and is used for receiving the microwave signals output by the object to be tested 40.

The multi-channel frequency conversion module calibration and measurement integrated automatic information platform is constructed by software and hardware interactive collocation, can complete the electrical performance index test and the summary processing task of the to-be-tested product, and can also perform corresponding extension test according to the to-be-tested product. Through automatic test software of the measurement and control server, basic information of a test instrument can be configured, test auxiliary information such as test opportunity and the like is input, and visual informatization of the test is improved; the working state of a to-be-tested object is acquired, the normal operation of the test is monitored, some fault information occurring in the test operation can be timely positioned, the problem can be conveniently and rapidly found, the fault can be timely eliminated, and the test efficiency is improved; the method comprises the following steps of obtaining a product to be tested and a test instrument calibration file, and facilitating query, summarization and arrangement of test information of the product to be tested; the data system has the characteristic of data informatization, the services of network information sharing and remote data inspection are developed, and the flow efficiency of data transfer storage and quality comparison verification is greatly improved. The multichannel frequency conversion module calibration and measurement integrated automatic information platform is refined and necessary, runs stably and efficiently, reduces errors and wrong operation possibility of manual operation in the test process, avoids unnecessary manual intervention, is safe and convenient in the test process, and saves labor cost and time cost.

In addition, as shown in fig. 7, a second embodiment of the present invention provides a method for testing a multi-channel frequency conversion module calibration integrated automatic test, which is used for testing by using the multi-channel frequency conversion module calibration integrated automatic test platform provided in the first embodiment, and the method includes the following steps:

s10, calibrating the vector network analyzer by using the calibration and measurement integrated machine to obtain calibration files of each path of the multi-path frequency conversion channels, storing the calibration files into the vector network analyzer, and using the calibration files as test references for testing the to-be-tested object;

s20, configuring the test parameters of the to-be-tested object by using the measurement and control information server, calling the calibration file, generating a test instruction according to the required test item and sending the test instruction to the test instrument;

s30, generating a corresponding microwave radio frequency signal by the test instrument according to the received test instruction, inputting the microwave radio frequency signal to the to-be-tested product, and performing multi-path distribution of the signal and control of a test sequence based on the calibration and test integrated machine so as to feed back an output signal of the to-be-tested product to the test instrument;

s40, transmitting test data to the measurement and control information server by using the test instrument for storage;

and S50, executing INTERNET service management function by using the measurement and control information server, and issuing local area network.

In an embodiment, the step S10 specifically includes the following steps:

connecting the input and output ends of the reference frequency converter to the reference end of the vector network analyzer, connecting the calibration frequency converter to the port of the signal input and output matrix, and connecting the calibration frequency converter to the signal port of the vector network analyzer through the input and output main port of the calibration frequency converter;

specifically, the radio frequency input end of the calibration frequency converter is connected to the input mechanical switch matrix in the signal distribution module, and then connected to the radio frequency PORT1 of the vector network analyzer through the main PORT thereof, and after the intermediate frequency output end of the calibration frequency converter is connected to the calibration filter, the calibration frequency converter is connected to the intermediate frequency PORT2 of the vector network analyzer through the output mechanical switch matrix in the signal distribution module.

Providing local oscillation signals by using a vector network analyzer, and respectively connecting the local oscillation ends of the reference frequency converter and the calibration frequency converter after passing through the local oscillation power divider;

and setting calibration parameters, calibrating, and storing the obtained multi-path calibration files into the vector network analyzer.

In an embodiment, the step S30 specifically includes the following steps:

during testing, connecting the input end and the output end of the to-be-tested object to a signal input matrix in the test instrument;

providing a local oscillator signal and an input signal by using the vector network analyzer;

the test instrument receives the test instructions sent by the measurement and control server, the mechanical switches are turned on one by one, and the next switch is turned off and on in sequence after the test is finished;

and the test instrument receives the signal of the output end of the product to be tested and displays the signal in an instrument display.

In the embodiment, before the to-be-tested object is tested, the to-be-tested object is subjected to frequency conversion calibration to obtain a calibration file, and the test is carried out based on the calibration file, so that accurate automatic test is realized; meanwhile, the measurement and control information server has the characteristic of data informatization, establishes a data release webpage by opening a WEB service, and calls test information of a local database by an HTTP service to meet the data query and inspection requirements of any to-be-tested object at any stage in the same local area network. The test platform has high test efficiency and test consistency, can greatly reduce errors caused by human factors to tests, is convenient for timely query and inspection of to-be-tested products by project groups and quality departments, accelerates the progress of the production process, and greatly saves time cost and labor cost.

It should be noted that, the method for testing the multi-channel frequency conversion module calibration and test integration automatic test of the present invention is used for implementing the test process of the multi-channel frequency conversion module calibration and test integration automatic test device, and has corresponding features and effects, and no surplus is needed here.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The utility model provides an integrative automatic test platform is proofreaded to multichannel frequency conversion module which characterized in that, test platform includes: the system comprises a measurement and control information server, a calibration and test integrated machine, a test instrument and a to-be-tested article, wherein the measurement and control information server is respectively connected with the calibration and test integrated machine and the test instrument, and the test instrument is connected with the to-be-tested article through a cable; the all-in-one of proofreading includes signal distribution module and frequency conversion calibration module, the tester table warp signal distribution module with the article that awaits measuring is connected, vector network analysis appearance among the tester table with frequency conversion calibration module connects, wherein:

calibrating the vector network analyzer by using the variable frequency calibration module to obtain a calibration file of each path of the multiple variable frequency channels, and storing the calibration file into the vector network analyzer to be used as a test reference for testing the to-be-tested object;

the measurement and control information server is used for configuring the test parameters of the to-be-tested object, calling the calibration file, generating a test instruction according to a required test item and sending the test instruction to the test instrument;

the test instrument generates a corresponding microwave radio frequency signal according to the received test instruction, inputs the microwave radio frequency signal to the to-be-tested product, and controls the multi-path distribution and the test sequence of the signal based on the signal distribution module so that the output signal of the to-be-tested product is fed back to the test instrument;

the test instrument transmits test data to the measurement and control information server for storage;

the measurement and control information server executes the INTERNET service management function and issues the local area network.

2. The multi-channel frequency conversion module calibration integrated automatic test platform according to claim 1, wherein the frequency conversion calibration module comprises a local oscillator power divider, a reference frequency converter, a calibration frequency converter and an intermediate frequency filter, a radio frequency and intermediate frequency end of the reference frequency converter and a radio frequency end of the calibration frequency converter are respectively connected to the vector network analyzer, and an intermediate frequency end of the calibration frequency converter is connected to the vector network analyzer after passing through the intermediate frequency filter; the local oscillator power divider is connected with a reference frequency conversion local oscillator port of the reference frequency converter.

3. The multi-channel frequency conversion module calibration integrated automatic test platform of claim 2, wherein a reference frequency conversion signal input port of the reference frequency converter is connected with a frequency conversion reference input port of the vector network analyzer, and a reference frequency conversion signal output port is connected with a frequency conversion reference output port of the vector network analyzer;

a local oscillator input port of the local oscillator power divider is connected with a local oscillator output main port of the vector network analyzer, a reference local oscillator output port of the local oscillator power divider is connected with a reference frequency conversion local oscillator port of the reference frequency converter, and a calibration local oscillator output port of the local oscillator power divider is connected with a calibration frequency conversion local oscillator port of the calibration frequency converter;

and a calibration frequency conversion input port of the calibration frequency converter is connected with each channel input port in the signal distribution module, and a calibration frequency conversion output port is connected with each channel output port in the signal distribution module.

4. The multi-channel frequency conversion module calibration integrated automatic test platform of claim 1, wherein the signal distribution module comprises a signal input matrix and a signal output matrix, wherein:

the signal input matrix comprises a multi-path power divider and a mechanical switch matrix; the signal output matrix adopts a combined mechanical switch matrix, the multi-path power divider is connected with the mechanical switch matrix, and the mechanical switch matrix is connected with the combined mechanical switch matrix;

a radio-frequency signal output port of the vector signal analyzer is connected with the multi-path power divider, and an output main port of the combined mechanical switch matrix is connected with a radio-frequency signal input port of the vector signal analyzer;

and the input/output port of each channel in the mechanical switch matrix is connected with the calibration frequency conversion input/output port of the calibration frequency converter or connected with the to-be-detected object.

5. The multi-channel frequency conversion module calibration integrated automatic test platform of claim 1, wherein the measurement and control information server comprises a measurement and control module and an information module, the measurement and control module comprises an instrument information configuration unit, an automatic test unit and a data processing unit, wherein:

the instrument information configuration unit is used for configuring reference information, test items and state parameters of the to-be-tested object and calling the calibration file;

the automatic test unit is used for generating a corresponding test instruction to the test instrument according to the configured test items;

the data processing unit is used for acquiring the test data, sorting the test data according to test items and channels to generate a test result report and storing the test result report;

the information module comprises a WEB service unit and a remote data checking unit, wherein:

the WEB service unit is used for establishing WEB services, opening a network HTTP protocol, starting an INTERNET information service function and issuing the test result report form through a local area network;

the remote data checking unit is used for the remote terminal to inquire the test result report.

6. The multi-channel frequency conversion module calibration integrated automatic test platform of claim 1, wherein the test instrument further comprises a programmable power supply, a signal source, a frequency spectrograph and a noise tester.

7. The multi-channel frequency conversion module calibration integrated automatic test platform as claimed in claim 1, wherein the object to be tested is a multi-channel microwave radio frequency module with frequency conversion function.

8. A multi-channel frequency conversion module calibration integrated automatic test method for testing by using the multi-channel frequency conversion module calibration integrated automatic test platform of any one of claims 1 to 7, the test method comprising:

calibrating the vector network analyzer by using the calibration and test all-in-one machine to obtain a calibration file of each path of the multi-path variable frequency channel, and storing the calibration file into the vector network analyzer to be used as a test reference for testing the to-be-tested object;

configuring test parameters of the to-be-tested object by using the measurement and control information server, calling the calibration file, generating a test instruction according to a required test item and sending the test instruction to the test instrument;

generating a corresponding microwave radio frequency signal by using the test instrument according to the received test instruction, inputting the microwave radio frequency signal to the to-be-tested product, and performing multi-path distribution of the signal and control of a test sequence based on the calibration and test integrated machine so that the output signal of the to-be-tested product is fed back to the test instrument;

transmitting test data to the measurement and control information server by using the test instrument for storage;

and executing an INTERNET service management function by using the measurement and control information server to issue the local area network.

9. The multi-channel frequency conversion module calibration integrated automatic test method of claim 8, wherein the calibrating and testing integrated machine is used for calibrating the vector network analyzer to obtain calibration files of each channel of the multi-channel frequency conversion channels and store the calibration files into the vector network analyzer, and the method comprises the following steps:

connecting the input and output ends of the reference frequency converter to the reference end of the vector network analyzer, connecting the calibration frequency converter to the port of the signal input and output matrix, and connecting the calibration frequency converter to the signal port of the vector network analyzer through the input and output main port of the calibration frequency converter;

providing local oscillation signals by using a vector network analyzer, and respectively connecting local oscillation ends of the reference frequency converter and the calibration frequency converter after passing through the local oscillation power divider;

and setting calibration parameters, calibrating, and storing the obtained multi-path calibration files into the vector network analyzer.

10. The method as claimed in claim 8, wherein the step of generating corresponding microwave rf signals by the test instrument according to the received test command and inputting the signals to the device under test, and controlling the signal multiplexing and test sequence based on the integrated calibration and test machine so that the output signals of the device under test are fed back to the test instrument comprises:

during testing, connecting the input end and the output end of the to-be-tested object to a signal input matrix in the test instrument;

providing a local oscillator signal and an input signal by using the vector network analyzer;

the test instrument receives the test instructions sent by the measurement and control server, the mechanical switches are turned on one by one, and the next switch is turned off and on in sequence after the test is finished;

and the test instrument receives the signal of the output end of the product to be tested and displays the signal in an instrument display.

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